Charles seymour



(No Model.)

0. SEYMOUR.

SWING SAW.

No. 427,196. Patented May 6. 18 90.

UNITED STATES FFICE T ATENT CHARLES SEYMOUR, OF DEFIANOE, OHIO, ASSIGNORTO THE DEFIANOE MACHINE WORKS, OF SAME PLACE.

SWING-SAW.

SPECIFICATION forming part of Letters Patent No. 427,196, dated May 6,1890.

Application filed January 4, 1890. Serial No. 835,873. (No model.)

To all whom it may concern:

Be it known that 1, CHARLES SEYMOUR, a resident of Defiance, in thecounty of Defiance and State of Ohio, have invented certain new anduseful Improvements in Swing- Saws; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to an improvement in swing-saws, the object beingto provide a spring-balance which will compensate for the resistanceopposed by gravity to the extreme of swing of the saw.

With this end in view my invention consists in certain novel features ofconstruction and combinations of parts, as will be hereinafterdescribed, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a front elevation, and Fig. 2is a side elevation.

A represents a hanger depending in the usual manner from the ceiling,where it is securely bolted, and 1 is an arm hung on a shaft 2, whichconnects the hanger and swingarm pivotally together. In boxes 3 3,formed at the terminus of the swing-arm 1, a shaft 4 is revolublysupported, and on the outer end of this shaft the circular saw 5 issecured. An endless belt 6, passed over the drums 7 and 8, located onshafts 2 and 4:, respectively, communicates motion from the former tothe latter, whereby the saw is rapidly rotated, and shaft 2 is providedwith loose and fixed pulleys 9, over one of which a drive-belt ispassed, accordingly as it is desired to impart motion or not to theshaft 2.

To compensate for the resistance opposed by gravity to the extreme ofswings of the arm 1, a pair of pivoted equalizers 10 and 11, havingyielding connection with each other, are resorted to. The lowerequalizer 11 is pivoted to the arm 1, and the upper one 10 is suspendedby means of alink 12 from the adjustable eyebolt 13, and said eyebolt isheld in place by a set-screw 14, or by similar means. By thisarrangement the equalizer 10 may be supported coincident with the centerof suspension, or on either side of the hanger and any distancetherefrom, the object being to normally incline the arm 1 to one side orthe other or to retain it in a vertical position, as most convenient.Apair of spiral springs 15 15 are held in suspension between the ends'of the equalizers by means of rods or stems 16 and 17, and the tensionof these springs is regulated by turning" the nuts 18 18 on the stems16. In lieu of the two springs one spring could be made to accomplishthe same result by attaching it outside of the hanger.

The reason for using the system of equalizers and connections, as shownin the drawings, is to permit attachment closer to the arm 1.

It is evident that slight changes might be resorted to in the form andarrangement of the several parts described without departing from thespirit and scope of my invention, and hence I do not wish to limitmyself to the exact construction herein set forth; but,

Having fully described my invention, what I claim as new, and desire tosecure by Let ters Patent, is

1. In a swing-saw, the combination, with a swing-arm, of a springconnected with said arm for retaining it yieldingly in position, andmeans for shifting laterally the point of suspension of the spring,substantially as set forth. I

2. In a swing-saw, the combination, with a hanger and a swing-arm hungthereon, of a pair of equalizers, one supported on the hanger and theother on the arm, and springs connecting the ends of these equalizers,substantially as set forth.

3. In a swing-saw, the combination, with a hanger and a swing-arm hungthereon, of a pair of equalizers, one pivoted on the arm and the otheradjustably supported on the hanger, springs connecting the outer ends ofthe equalizers, and means for regulating the tension of the-springs,substantially as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

. CHARLES SEYMOUR.

Witnesses:

GEO. W. DEATRICK, P. .KESTENING.

